Gas-stove.



PATENTED Nov. s, 1903.

P. J. DOYLE. GAS STOVE.

APPLIcATIoN FILED MAB. e, 1903.

`2 SHEETS-SHEET 1.

N0 MODEL.

Tn: Nonnls Ferias oc.4 Pam'nuruc.. wAsmNc-Tou. n, c.

No. 742,844. PATENTED Nov. 3, 1903. Y

F. J. DOYLE.

GAS STOVE.

APPLwATIoN Hmm MAB. e, 190s.

` 2 SHEETS-#SHEET 2.

' No MODEL.

Patented November 3, 1903.

PATENT OFFICE.

FRANCIS J. DOYLE, OF CHICAGO, ILLINOIS.

GAS-STOVE.

SPECIFICATION forming part of Letters Patent No. 742,844, dated November 3, 1903.

Application filed March 6, 1903. Serial No. 146.526. (No model.)

To tu whom t may concer-71,:

Be it known that I, FRANCIS J. DOYLE, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Gas-Stoves, of which the following is a specification.

This invention relates to improvements in gas-stoves, and refers more specifically to an improved heating-stove of the character referred to.

The object of the invention is `to providea simple practical construction in which the products of combustion are caused to circulate through the stove in such manner asA to insure a more perfect combustion and to radiate the maximum amount of heat produced by such combustion; to provide a construction in which supplies of heated air are fed to the burning gases at various points throughout the circulation-passages, thereby creating a more intense combustion and heat and also completely oxidizing the gas, so that the stove is practically odorless in operation; to provide a construction in which the products of combustion are at first dispersed after leaving the initial combustion-chamber or fire-box, intermingled with heated air during such dispersion, and finally returned to a common receiving chamber before being finally discharged from the stove, and in general to provide a simple, compact, and efficient device of the character referred to.

To the above ends the invention consists in the matters hereinafter described, and more particularly pointed out in the appended claims, and the invention will be more readily understood from the description by reference to the accompanying drawings, forming a part thereof, and in which- Figure 1 is an axial vertical sectional View of a stove embodying my invention. Fig. 2 is a transverse or horizontal sectional View taken on line 2 2 of Fig. 1 and looking downwardly. Fig. 3 is a similar transverse or horizontal view taken on the indirect line 3 3 of Fig. l and looking downwardly.

Referring to said drawings, 1 designates as a whole a suitable base or support upon which the stove proper is mounted, conveniently provided with lugs 2, whereby it is elevated to some extent, and provided with a suitable opening 3 at one side, through which extends the supply-pipe 4, leading from any suitable source of gas or Vapor fuel. At a point central of the base is an aperture 5, through which the upturned endl@ ofthe supply-pipe 4 extends, and upon this is mounted the burner proper, (designated, as a whole, 7.)

8 designates as a whole a cylindric member resting at its lower end upon the base 1 and arranged concentrically with the burner 7, and upon the upper end of said member 8 is supported a casting or member 9, which is preferably and, as herein shown, dished or concave at its upper side and forms the lower side of an annular inlet-chamber 10. The member 9 is conveniently provided with an annular downturned flange ll, which telescopes within the upper end of the cylinder 8 and serves to secure the parts together, the casting 9 being extended both inwardly and outwardly from the annular liange 11. At its outer edge or periphery it is provided with an upstanding cylindrical portion 12, the upper edge of which forms the support upon which rests a somewhat-similar casting or member 13, which forms the upper side of the air-inlet chamber 10. The member 13 is provided with a suitable marginal ledge 14, which rests upon the upper edge of the cylindric portion 12 and is provided both above and below said ledge with cylindric annular flanges, as 15 and 16, which serve to secure the connected parts together. The lower concave casting 9 is provided at its center with a relatively large opening 17, around which is formed an upstanding cylindric ange 18, and similarly the upper casting 13 is provided with a corresponding central opening surrounded by a depending flange 19, which overlaps the ange 18, the two forming the inner cylindric wall of the annular air-inlet chamber 10.

20 designates as a whole a cylindric member constituting an inner partition, which in part forms the inner initial combustion-chamber or tire-box 21, said member 20 having the form of anl open-ended cylinder constructed to fit at its upper end and being secured Within the annular flange 18 and depending downwardly within the outer cylindric shell 8 to a point approximately midway of the latter. That part of the partition member 2O which depends below the member 9 is perforated or TOO of reticulated form to provide a restricted passage of air therethrough. The upper concave member 13 is provided with an annular upstanding flange 22, which forms, in effect, an extension of the part of the fire-box formed by the member 20, and the upper end of said fire-box is closed by a dome-shaped partition 23, which is freely perforated, as indicated clearly in the drawings, to permit ready es-r cape of the products of combustion. Said dome is in the present construction conveniently formed by means of a third concave or dish-shaped casting 24, which rests upon the upstanding flange 22 of the member 13 and forms, in conjunction with the latter, a second annular chamber 25, which for convenience of description will be hereinafter designated the intermediate mixing-chamber, although it forms, in effect, a part of the circulating system of the stove. The outer shell v 26 of the main body of the stove is of cylindric form and rests upon the ledge 14 and telescopes over the upstanding ange 15 of the intermediate casting 13, as shown clearly in Fig. 1 of the drawings. The upper concave casting 24 extends at its periphery adjacent to the inner wall of the outer shell 26, but is sufficiently removed therefrom to provide an annular passage 27 for the passage of the products of combustion therethrough, as will hereinafter appear. .A plurality of passages 23 are provided which afford communication between the annularairinlet chamber 10 and the space above the concave casting 24, and in order to provide such passages the intermediate concave member 13 is conveniently provided with a plurality (three in the present instance) of upstanding hollow nipples or bosses 29, which register with corresponding openings or passages 30, formed through the member 24. The bosses 29 are conveniently made to serve as supports for the peripheral portions of the casting 24, and to this end the latter is so constructed as to rest directly upon the upper ends of said nipples, as indicated clearlyy in the drawings. The upper portion of the main body of the stove is divided into a series of circulating-passages and a central nal comminglingormixingchamber31,into which all of the products of combustion are discharged before their final escape from the stove. To this end an inner cylindric partition member 32 is provided, having an open upper end and a partially-closed and preferably convex bottom wall 33, which is supported concentrically within the upper shell, the interior of this partition member forming the final mixing-chamber 31, hereinbefore mentioned. As a convenient means of .supporting said member 32 and at the same time affording inlet-passages leading thereto the bottom wall thereof is provided with a pluthereof, 55, serving as a handle.

The annular space between the exterior of the inner shell 32 and the outer shell 26 is subdivided by means of two conce-ntricallyarranged cylindric partitions 37 and 38, so as to provide an inner uptake circulating-passage 39, an outer downtake circulating-passage 40, and an intermediate airheating chamber 41, said partitions 37 and 33 being to this end suitably spaced apart and mounted at their lower ends upon. the casting 24, while upon their upper ends rests an annular internal cap-casting 42, which forms the partition between the upper end of the air-heating chamber and the space above the latter.

43 designates as a whole the top or outer cap member of the stove, which as conveniently constructed and shown herein is an annular casting provided with a central downwardly-extending extension 44, which fits within and rests upon the upper end of the inner shell 32, that portion of said casting which forms the top proper being convexly curved outwardly and downwardly. Near its periphery the top casting is provided upon its under side with a depending cylindric flange 45, which fits within the upper end of the outer shell 26, said top cap thus serving to inclose aspace above the upper end of the air-heating chamber, which forms a communicating passage 46, extending from the inner circulating-passage 39 to the outer circulating-passage 40. The several members of the stove are conveniently secured together by means of through-bolts, as 47, 43, and 49, and in the present instance the intermediate casting 13v and the parts above the latter are detachably united and hinged to the subjacent member 9 in such manner that the main body of the stove may be thrown or tilted back, so as to open the tire-box or initial com bustion-chamber and expose the burner therein. To this end the castings 13 and 9 are respectively provided at one side with hinge lugs or ears, as indicated at 50, through which is extended a pintle 51, while at the opposite side a latch 52 is mounted upon the lower member 9, and an apertured lug 53 is provided upon the under side of the member 13, with which the latch is adapted to engage. In the preferred construction shown herein the latch 52 is down inthe form of an anglelever pivoted at its angle, as indicated at 54, the downwardly and horizontal extending arm The latch is normally held in engagement with thelug by means of a spring 56. Desir-ably and as shown herein a petticoat-flange 57 is arranged to conceal the latch and hinge mechanisms and serves also as an ornamental finish for the lower part of the body of the stove. The lower concave casting 9 is provided with a suitable air-inlet, as 58, which admits air to the annular air-inlet chamber 10, and is also IOO IIC)

provided with a pluralityof apertures 59, affording communication between said air-inlet chamber and the initial air-heating chamber 60 within the shell S. Desirably the outer shell 26 is provided with awindow, as 61, closed with isinglass or the like, so that light from the combustion may pass therethrough, and desirably, also, the intermediate partition or shell 38 is similarly provided with a window 62 at a point opposite the window 61. If preferred, also, a peepopening or smaller window 63 may be provided in the top shell 43, so located as to enable the combustion taking place within theinnercirculating-passage 39 to be viewed.

As a convenient accessory the stove may be provided with a shelf 64 of open or gratelike construction, which is provided with a plurality of legs 65, connected with a ring 66, which is constructed to tit within the opening of the annular top 43 and rest upon a rabbet 67 therein.

Any suitable burner may be employed, but that shown herein is particularly well adapted to a stove of this character and is made the subject of a separate application for patent filed contemporaneously herewith, Serial No. 146,525, and to which application reference is made for a more particular description. It

is sufcient for a comprehension of the pres-` ent invention to say that said burner is of tubular'form and provided at its lower end with air-inlets 69, from which the jet of burning gas emerges.

The operation of the stove may now be briey described, as follows: Assuming that the top of the stove has been tilted back to expose the burner and the latter turned on and ignited and the stove closed, the air will enter the annular air-inlet chamber 10 through the inlet 5S and will escape from said inlet-chamber in two different directions-viz., a part of the air will pass downwardly through the openings 59 to the initial air-heating chamber, while other portions of the air will pass upwardly through the hollow nipples 2S to the main air-heating charnber 4-1. That part of the air necessary to feed the interior of the burner will be drawn downwardly and pass in through the inlets of the burner 68, while the larger quantity of air necessary to supply the combustion at the burner-jet will be drawn through the perforated partition member 2O and pass upwardly outside of the burner to the upper end of the fire-box. In so passing downwardly within the initial air-heating chamber and through the perforated partition member 20 the air will be considerably warmed or heated and will thus be improved for combustion. The products of combustion escaping from the rebox upwardly through the perforations 23 in the domeshaped top of the latter will pass upwardly through the inner circulating-passages 39 to the space 46 at the top of the stove and thence downwardly through the outer circulatingpassages 40 to the intermediate mixing-chamber 25. In this mixing-chamber' the products of combustion will commingle and pass upwardly through the passages 36, formed by the hollow legs 34, and into the final mixing or receiving chamber 3l, from which they escape into the outer air. The products of combustion after they escape from the firebox into the circulating-passages 32 are there supplied with additional quantities of heated air, so as to promote and render more perfect the combustion. This additional supply of air is fed into said circulating-passages 32 as follows: From the air-inlet chamber. l0 the passages 28 and continuations thereof, 30, lead upwardly into the annular air-heating chamber 41, the inner walls of which are provided with numerous perforations or air-openings which afford communication between said air-heating chamber and the circulating-passages. The products of combustion, therefore, passing through the circulating-passages 32 are constantly augmented by supplies of heated air until they pass from the circulating-passages 32 into the space or passage which forms the communication between the circulating-passages 32 and the return circulating-passages 40. Inasm uch as the products of combustion are thus caused to circulate entirely around the air-heating chamber 41, it will be obvious that the air fed to the products of combustion in the circulating-chambers 32 will be highly heated and an intense combustion thereby created. During the downward return of the gases or products of combustion it will be noted that they are in contact with the inner surface of the outer wall or shell of the stove and accordingly give up a large proportion of the heat which is radiated out to said outer shell. The entire quantity of products of combustion as augmented by thesupplies of air added thereto during the circulation through the stove passes into the central iinal mixing or receiving chamber 31, from whence it is discharged into the outer air. Inasmuch as the gases have been thoroughly oxygenated by the addition of fresh air from time to time during the circulation, the gases as finally discharged are not when suitable fuel is used objectionable. It will be noted that during the passage of the products of combustion from the return-passages 40 upwardly through the passages 36 and while within the final mixing or receiving chamber 31 they are reheated to some extent because surrounded by the circulating-passages 32, in which the combustion is most intense.

I claim as my invention- 1.A In a gas-stove the combination with a suitable base, of a shell mounted thereon inclosing a space constituting an initial airheating chamber, a lower annular member seated upon the upper end of said shell and forming the lower side of an annular air-inlet chamber,a second intermediate annular member supcrposed above the first annular member and forming the upper side of said airinlet chamber,a third member arranged above said intermediate annular member and forming in conjunction with the latter an intermediate mixing-ehamber and the upper wall of a central fire-box or combustion-chamber, an outer cylindrical shell connected with and extending upwardly from the outer periphery of the annular air-inlet chamber, an annular outer cap member mounted upon the upper end of said last-mentioned cylindrical shell, a cylindric member connected with the central opening of said annular cap member, extending downwardly therefrom and provided with a lower end wall forming a central mixing-chamber, outer and inner annular partitions interspaced between the main outer shell and the central mixing-chamber whereby inner uptake and outer downtake circulatingpassages are formed, a cap member uniting the upper ends of said annular partitions and forming in conjunction with the latteran annular air-heating chamber and a circulating space or passage affording communication between the inner uptake and outer downtake circulatingpassages, comm unicating passages between the annular airinlet chamber and said annular air-heating chamber communicating openings between said annular air-heating chamber .and said uptake circulating-passages, communicating passages between said intermediate mixingchamber and the central mixing-chamber and air-inlets admitting air into said annular airinlet chamber, substantially as described.

2. In a gas-stove the combination with a suitable base, of a cylindric shell mounted thereon and forming the base portion of the stove, a lower horizontally-disposed convex member situated upon the upper end of said base-shell and provided with marginal upstanding flanges, a second intermediate member arranged parallel with the lower horizontal member and forming iu conjunction with the latter an annular air-inlet chamber, a third horizontally-disposed member supported at a distance above said intermediate member and forming the upper side of an intermediate mixing-chamber, a fire-box formed by the walls surrounding the annular openings of said lower and intermediate horizontal members and the central portion of said upper horizontal member, an outer cylindrical shell connected with and extending upwardlyfrom the outer periphery of the annular air-inlet chamber, an annular outer cap member mounted upon the upper end of said last-mentioned cylindrical shell, a cylindric member connected with the central opening of said annular cap member, extending downwardly therefrom and provided with a lower end wall forming a central mixingchamber outer and inner annular partitions interspaced between the main outer shell and the central mixing-chamber Wherebyinner uptake and outer downtake circulating-passages are formed, a cap member uniting the upper ends of said annular partitions and forming in conjunction with the latter an annular airheating chamber, and a circulating space or passage aordin g communication between the inner uptake and outer downtake circulating-passages, communicating passages between the annular air-inlet chamber and said annular air-heating chamber communicating openings between said annular air-heating chamber and said uptake circulating-passages, communicating passages between said intermediate mixing-chamber and the central mixing-chamber and air-inlets admitting air into said annular air-inlet chamber, substantially as described.

8. In a gas-stove the combination with the base and the cylindric shell mounted thereon, of the lower horizontally-disposed member 9, situated upon the upper member of said baseshell, the intermediate member 13 having hinged and latch connections with said lower horizontal member at the respective sides thereof, the fire-box formed in part by the inner annular walls of said lower and intermediate horizontal 'members, and the gasburner located within said {ire-box and accessible by unlatching and tilting upwardly the intermediate member, substantially as described.

4t. In astove ofthe character described, the combination with the upright shell forming the base portion of the stove, of the horizontally-disposed annular castings 9 and 13, superposed upon said shell, each provided with an internal upstanding Ilange as 1S and 22, forming side wall portions of the lire-chamber and the upper horizontally-disposed member 24 provided with an apertured central portion forming the top of said lire-chamber, substantially as described.

5. In a stove of the character described, the combination with the upright shell forming the base portion of the stove, of the horizontally-disposed annular castings 9 and 13, superposed upon said shell, each provided with an internal upstanding flange as 18 and 22, forming side wall portions of the lire-chamber and the upper horizontally-disposed member 24 provided with an apertured central portion forming the top of said tire-chamber, and the depending cylindric partition member 20 forming in eect a downward extension of said tire-chamber and perforated substantially as described.

FRANCIS J. DOYLE. 

